aws-lambda-compat

@netlify/aws-lambda-compat

AWS Lambda compatibility wrapper for Netlify Functions. Lets you author Netlify Functions using the AWS Lambda handler signature.

Installation

npm install @netlify/aws-lambda-compat

Usage

Wrap your Lambda-style handler with withLambda and export the result as your Netlify Function:

import { withLambda } from '@netlify/aws-lambda-compat'
import type { HandlerEvent, HandlerContext, HandlerResponse } from '@netlify/aws-lambda-compat'

export default withLambda(async (event: HandlerEvent, context: HandlerContext): Promise<HandlerResponse> => {
  const name = event.queryStringParameters?.name ?? 'World'

  return {
    statusCode: 200,
    headers: { 'content-type': 'application/json' },
    body: JSON.stringify({ message: `Hello, ${name}!` }),
  }
})

How it works

withLambda converts between the two function signatures:

1. Incoming Request is converted to a Lambda HandlerEvent (URL, headers, query string, body with automatic base64 encoding for binary payloads)
2. The Netlify Context is mapped to a HandlerContext with sensible defaults for AWS-specific fields
3. The HandlerResponse returned by your handler is converted back to a web-standard Response

TypeScript types

The package exports the following AWS Lambda-compatible types:

• Handler
• HandlerCallback
• HandlerContext
• HandlerEvent
• HandlerResponse

Additionally, the package exports:

• LambdaHandler — the type of the handler function passed to withLambda

Contributors

Please see CONTRIBUTING.md for instructions on how to set up and work on this repository. Thanks for contributing!